<template>
  <div class="page">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="box">
        <img
          src="../assets/logo.png"
          alt=""
        >
      </div>
      <!-- 表单区域 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input placeholder="请输入用户名"  v-model="loginForm.username" prefix-icon="iconfont icon-user"> </el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input placeholder="请输入登录密码" v-model="loginForm.password"  type="password" prefix-icon="iconfont icon-mimacopy"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary"   @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginFormRef">重置</el-button>
        </el-form-item>
      </el-form>
   
    </div>
  </div>
</template>
<script>
export default {
   data() {
      return {
        // 这是登录表单的数据对象
        loginForm: {
          username:'admin',
          password:'123456'
        },
        // 这是表单的验证规则对象
        loginFormRules:{
          // 验证用户名是否合法
          username:[
             { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ],
          // 验证密码是否合法
          password:[
            { required: true, message: '请输入登录密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
          ]
        }
      }
    },
    methods: {
      // 点击重置按钮，重置登录表单
      resetLoginFormRef(){
        // console.log(this);
        // ref=loginFormRef 获取表单引用对象
        this.$refs.loginFormRef.resetFields();
      },
      login(){
        // 表单预校验
        this.$refs.loginFormRef.validate(async valid=>{
          console.log(valid);
          if(!valid) return;
         const { data:res } = await this.$http.post("login",this.loginForm);
        //  console.log(res);
        if(res.meta.status !==200) return this.$message.error('用户名或密码不正确')
        this.$message.success('登录成功')
        // console.log(res)
        // 1.将登录成功之后的token,保存到客户端的sessionStorage中
            // 1.1项目中除了登录其它的api接口，必须在登录之后才能访问
            // 1.2token应只在当前网站打开期间生效，所有将token保存在sessionStorage中
        window.sessionStorage.setItem("token",res.data.token)
        // 2.通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push('./home')
        // this.$router.push('aa')
        // console.log('登录成功');
        })
      }
    }
  
};
</script>
<style lang="less" scoped>
.page {
  background: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background: #ffffff;
  border-radius: 3px;
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  .box {
    height: 130px;
    width: 130px;
    border: 1px solid #eeeeee;
    border-radius: 50%;
    padding: 10px;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #ffffff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background: #eeeeee;
      box-shadow: 0 0 10px #ddd;
    }
  }
}
.login_form{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns{
  display: flex;
  justify-content: flex-end;
}
</style>